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Sanyo PLC-400P Service Manual page 24

Portable lcd color video projector

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CONVERGENCEADJUS
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Use a grid pattern for adjustment. First make a rough
adjustment using a video signai and then fine adjust by using a
computer signa).
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1. Simuitaneousty turning the convergence adjustment screw
"C" dockwise and "B" counterclockwise turns the image
ciocKwise. (Fig. 1)
Simuitaneousty turning adjustment screw "C" counter-
c)oct<wise and "B" clockwise turns the image counter-
cfockwise. (Fig. 2)
2- Simuitanoousty turning adjustment screws "B" and "C"
c)ocf<wtse moves the image up. (Fig. 3)
Simuttaneousty turning adjustment screws "B" and "C"
counterclockwise moves the image down. (Fig.4)
3. Turning adjustment screw "D" dockwise moves the
[mage right. (Fig. 5)
Turning adjustment screw "D" counterctockwise moves the
image ieft. (Fig. 6)
fig1
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1. Switch the projector on and project a video signai (grid
pattern) on the screen.
2. insert paper, etc. into R (or B) panets to btock the R (or B)
iight.
3. Loosen the 4 screws "A" (Fig.7 ) using the 2.5mm hex
wrench.
4. Using the screws "B" and "C", align so that the R (or B) grid
pattern vertical center iino is paraitoi to the G grid pattern
verticat center iine. (Fig. 1 or 2)
5. Turn the screws "B" and "C" in the same direction to align
the R (or B) horizontal center iine on top of the G horizontal
iine.(F!g.3or4)
6. Repeat steps 4 and 5 untii the R (or B) horizontat iine is
aligned exactfy ort top of the G horizontal fine.
7. Using the screw " D , " a)!gn the R (or B) vertcai center iine on
top of the G vertical [ine- (Fig.5 or 6)
8. By repeating steps 4 through 7, align the R (or B) grid
pattern on top of the G grid pattern.
9. input a computer signal (grid signa!) and check the
convergence in fine sync'd condition (grid vertical iine is
most ctear). tf not aligned, repeat steps 4 through 9.
10. Tighten the four screws "A" (previousty ioosened in step 3
above) with the 2.5mm hex wrench.
11. After tightening the screws, check convergence, if not
aligned, repeat steps 2 through 10 above.
fig3
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fig5
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For convergence adjustment, use G (green) as the reference
standard. Atign R (red) and B (biue) with G by adjusting the
position and angle of the R and B )iquid crystal panets. Screws
"B,' "C" and "D' are for convergence adjustment-
24

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